Gary A Lorden

Author:

Gary Lorden

ISBN #:

0387964207

Author:

Gary Lorden

ISBN #:

0452288576

US Patent:

6639672, Oct 28, 2003

Filed:

Jul 15, 2002

Appl. No.:

10/197639

Inventors:

David L. Haavig - Laguna Hills CA
Gary Lorden - Pasadena CA

Assignee:

Micro Imaging Technology - Laguna Hills CA

International Classification:

G01N 2100

US Classification:

356338, 356343

Abstract:

Unique methods and apparatus are provided for rapidly identifying microscopic particles, such as protozoa and other microbes suspended in a fluid or gas. In one embodied form, the apparatus comprises: a polarized laser that produces a beam waist; an optical chassis including multiple light detectors, each light detector positioned around and oriented to view, without obscuration, a common region of regard of the laser beam waist; a sample chamber for containing a fluid sample to be analyzed; means for holding the sample chamber in a prescribed orientation with respect to the laser beam waist and in the common region of regard of the light detectors; means for causing the particles in the sample to circulate through the laser beam waist; means for covering the light source and optical chassis to create a dark enclosure; means for converting the light intensity values measured by the detectors into digital values; means for continuously entering the digital values into a computer; means for determining when a particle has entered the light beam at the common region of regard based on the digitized measurements; means for converting the digitized values to calibrated values; means for extracting Event Descriptors from the digitized and calibrated event data; means for calculating Discriminant Function values from the Event Descriptors; and means for defining probability histograms that enable the calculation of the probability that a Discriminant Function value calculated from measured values was caused by a specific particle species.

US Patent:

7664175, Feb 16, 2010

Filed:

Jun 14, 2005

Appl. No.:

11/152636

Inventors:

Christopher E. Chupp - St. Louis MO, US
Michael S. Gramelspacher - Fairview Heights IL, US
Gary A. Lorden - Pasadena CA, US

Assignee:

Koplar Interactive Systems International, L.L.C. - St. Louis MO

International Classification:

H04N 7/12

US Classification:

37524001, 375240, 37524012

Abstract:

A method for modulating mark () within content signal () that has frames, where each of the frames has content lines and one or more measurable parameters, where each of the content lines has pixels, and where each of the pixels has a value, the method comprising selecting framesets from among the frames of the content signal; modulating at least two of the framesets; and causing mark () to be present within content signal () by at least modulating at least two of the framesets.

US Patent:

20100166083, Jul 1, 2010

Filed:

Dec 28, 2009

Appl. No.:

12/648006

Inventors:

Christopher E. Chupp - St. Louis MO, US
Michael S. Gramelspacher - Fairview Heights IL, US
Gary A. Lorden - Pasadena CA, US

International Classification:

H04N 5/14
H04N 7/12

US Classification:

37524026, 348702, 348E05062, 375E07076

Abstract:

A method for modulating mark () within content signal () that has frames, where each of the frames has content lines and one or more measurable parameters, where each of the content lines has pixels, and where each of the pixels has a value, the method comprising selecting framesets from among the frames of the content signal; modulating at least two of the framesets; and causing mark () to be present within content signal () by at least modulating at least two of the framesets.

US Patent:

6421121, Jul 16, 2002

Filed:

Feb 10, 2000

Appl. No.:

09/501840

Inventors:

David L. Haavig - Oceanside CA
Gary Lorden - Pasadena CA

Assignee:

Micro Imaging Technology - Laguna Hills CA

International Classification:

G01N 2100

US Classification:

356338, 356343

Abstract:

Unique methods and apparatus are provided for rapidly identifying microscopic particles, such as protozoa and other microbes suspended in a fluid or gas. In one embodied form, the method comprises illuminating the particles to be detected with an intense light source such as a laser, detecting scattered light by means of an array of optical sensors surrounding a detection zone, converting the detected light to an electrical signal, and comparing the derived signal with at least one frequency-of-occurrence/probability histogram curve to qualitatively and/or quantitatively identify the microscopic particles present.